A chemist needs 18 liters of a 30% acid solution. How much of a 20% solution should be

mixed with a 40% solution to get that (round your answer to the nearest liter) ?

4 liters

5 liters

9 liters

7 liters

100pts: Prove or disprove: If x is a 2 digit number, and y is the number formed by reversing the order of X's digits, then x + y = 11 (x+y). For example, if x is 54 then y is 45. I give brainliest!

The basic sticker price on Mr. Feldman's new car was $3200, The options he desired cost an additional $1800. What percent of the total price was made up options?

What is 12 / 2/3? nothing pops up when i search it and i have a module exam!

How do i put f (x) = - x^2 + 8x + 9 in vertex form?

Y=3x means vertical stretch by a factor of

Mile markers along the highway tell drivers how many miles they have traveled from one location to another. Suppose Daniel sees mile marker 141 when he gets onto the highway and mile marker 67 when he exits the highway.

Bank A charger a 4$ service fee and $0.25 for each check written. Bank B charges $5 and $0.20 for each check written. How many checks does a person need to write each month for the two banks to charge the same amounts in fees.

Each brochure is 23 centimetres wide. The table is 1.5 metres wide. Estimate how many brochures you can put side by side on the table?

Alaina sugar cookie recipe calls for 2 1/4 cups of flour per batch if she wants to make 2 / 3 a batch of cookies how much flour should she use

Evaluate e-1/2f when e=15 and f=12